整合主体设计和皮Zn-Mn二原子位点的定制电子效应,以实现高效的CO2电还原
Jiajing Pei1, Li Yang2,3, Jie Lin4
1Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China.
Angewandte Chemie (International ed. in English)
|November 24, 2023
概括
这项研究引入了一种新型的双原子位点催化剂 (DASC),用于高效的二氧化碳电还原 (CO2 RR). 催化剂表现出卓越的性能,实现更清洁的能源应用的高效率和电流密度.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 催化剂是一种催化剂.
背景情况:
- 调节宿主结构会影响CO2电还原 (CO2 RR) 中的活性部位反应性和质量转移.
- 开发高效的催化剂对于推进二氧化碳RR技术至关重要.
研究的目的:
- 开发一种不对称的双原子位点催化剂 (DASC),用于增强二氧化碳的电还原.
- 调查DASC的结构-属性关系,以改善催化活性.
主要方法:
- 两步联体蚀刻-热解,以创建一个黄皮碳框架 (Zn1Mn1-SNC).
- 在金属有机框架 (MOF) 上固定S,N-协调的Zn-Mn二极管.
- 使用DFT模拟来理解反应机制.
主要成果:
- 在一个H电池中,Zn1Mn1-SNC DASC表现出较低的开启超电位 (50mV) 和高的CO法拉第效率 (97%).
- 在一个流动电池中,在 -0.85 V 时实现了高电流密度 (500 mA cm-2).
- DFT模拟证实,S,N-协调的Zn-Mn二原子位降低了反应能量屏障.
结论:
- 与现有催化剂相比,开发的DASC显示出优越的二氧化碳RR性能.
- 该研究强调了定制电子效果和在催化剂设计中的结构可访问性的重要性.
- 研究结果为开发用于二氧化碳转换的高度可访问的原子催化剂提供了见解.
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